interface CpuUsage {
    user: number;
    system: number;
}
export interface ProfilerClock {
    /** High-resolution monotonic time in milliseconds. It is suitable for measuring elapsed time. */
    now(): number;
    /** Unix wall-clock timestamp in milliseconds. It is suitable for timestamps shared between processes. */
    epochNow(): number;
    /** Process CPU usage since startup, or since `previousValue` when it is supplied. */
    cpuUsage(previousValue?: CpuUsage): CpuUsage;
    /** Current-thread CPU usage since startup, or since `previousValue` when it is supplied. */
    threadCpuUsage?(previousValue?: CpuUsage): CpuUsage;
}
export declare const systemClock: ProfilerClock;
export declare const cpuUsageToMs: (usage: CpuUsage) => number;
export {};